128855485 has 32 divisors (see below), whose sum is σ = 173203200. Its totient is φ = 91238400.

The previous prime is 128855459. The next prime is 128855491. The reversal of 128855485 is 584558821.

It is not a de Polignac number, because 128855485 - 2²⁵ = 95301053 is a prime.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 647416 + ... + 647614.

It is an arithmetic number, because the mean of its divisors is an integer number (5412600).

Almost surely, 2^128855485 is an apocalyptic number.

It is an amenable number.

128855485 is a deficient number, since it is larger than the sum of its proper divisors (44347715).

128855485 is a wasteful number, since it uses less digits than its factorization.

128855485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 469.

The product of its digits is 512000, while the sum is 46.

The square root of 128855485 is about 11351.4529906968. The cubic root of 128855485 is about 505.0886816125.

The spelling of 128855485 in words is "one hundred twenty-eight million, eight hundred fifty-five thousand, four hundred eighty-five".